Electric circuit controlling device



March 23, 1937.

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J. SACHS ELECTRIC CIRCUIT CONTROLLING DEVICE Filed Jan. 30, 1935 wag .fnr/entur' ttarngy Patented Mar. 23, 1937 UNITED STATES PATENT OFFICE 2,074,863 ELECTRIC cmcm'r communes nnvrca Joseph Sachs, West Hartford, Conn. Application January :0, 19:5, seine No. 4,016

1o (c1. zoo- 114) The invention is particularly applicable to an electric circuit controlling device having a main base with circuit connections thereon and having main fuses which are mounted upon a removable carrier. In a device of this character the removal of the carrier and the fuses from the base serves to break the circuit and the device thus functions as a switch. I

One of the objects of the present invention is to provide a device of the character described Figs. 1 and 2 but showing an alternativeembodi wherein there is a manually adjustable device which serves in one position to prevent the removable carrier from entering the base sufllciently to reestablish the electrical connection.

Other objects of the invention will be apparent from the following specification and claims.

In the accompanying drawing three alternative embodiments of the invention are disclosed,

but it will be understood that the drawing is in-' tended for illustrative purposes only and is not be construed as defining or limiting the scope "of the invention, the claims forming a part of this specification being pose.

Of the drawing: 7 Fig. 1 is a front view of a device embodying the invention.

relied upon for that pur- Fig. 2 is a front view similar to Fig. 1 but showing the adjustable element in a different position. Fig. 3 is a vertical sectional'view taken along the line 3-3 of Fig. 1.

Fig. 4 is a combined side and vertical sectional view similar to Fig. 3 but showing the adjustable element in position to prevent full entry of the carrier and of the parts thereon. Figs. 5 and 6 are views similar respectively to ment of the invention.

Fig. 7 is a fragmentary view in some respects similar to Fig. 1 but showing another alternative embodiment of the invention. In this view the fuse carrier is'omitted.

Fig. 8 is a transverse sectional view taken along the'line 8.-8 of Fig. 7 and also showing the fuse carrier and fuses in section.

Fig. 9 is a-view similar to Fig. 8 but showing the adjustable element in position to prevent full entry of the fuse and carrier and the parts thereon.

Referring to the drawing, particularly Figs. 1 to 4 thereof, -i represents a main insulating base which is adapted to be secured to a suitable rear supporting wall, as for instance the rear wall of an enclosing cabinet. The cabinet does not of itself constitute any part of the present invention and it is not shown.

The base I is provided with atleast one recess 2 adapted to receive a removable fuse carrier.

There maybe two or more such recesses but only one is shown. The recess 2 is closed or substantially closed at the top, bottom and both sides and also the rear but is open at the front.

Carried by the main base near the rear thereof is at least one pair of electrical contacts 3 and l, and preferably there are two pairs of contacts. Formed at the rear of the recess 2 are openings or slots 5, 5 and 6, 6 which are in register with the respective contacts 3, 3 and 4, I,

as clearly shown in Figs. 3 and 4. r

The base I is provided with an upward projecting ledge I and an integral portion of each contact 3 extends upward along the front of this ledge and is held in place by a forward extending screw 1. Also held by the screw 1 is a wire terminal 8. The base I is also provided with a downward projecting ledge l and an integral portion of each contact 4 extends downward along the front face of this ledge. The said portion of the contact is held in place by a; forward extending screw 9. Also held by, the screw is a wire terminal Ill.

A fuse carrier I l is provided whichis preferably of insulating material and which is adapt- .ed to enter and approximately fit the recess 2 in the base I. The fuse carrier II is provided on its rear face with at least one pair of contacts l2 and I3 adapted to receive a cartridge fuse, and preferably there are two pairs of such contacts. Also carried by the fuse carier is at least one pair of conducting blades or prongs H and I! which are electrically connected with the corresponding fuse contacts. When there .are two'pairs of fuse contacts there are two pairs of conducting prongs.

' eral contacts l2'and l3.' The fuses are concealed and access can be had to them for purposes of inspection or replacement only by entirely removing the fuse carrier from. the base and thus tion. The carrier may have grooves for receiving the-forward edge portions of the barriers.

The removable fuse carrier. may be withdrawn from the recess in the base not only for the purpose of inspecting or renewing the fuses but also for the purpose of breaking the circuit. When the purpose is to maintain the interruption of the circuit itis desirable to replace the fuse carrier in the device in such a ,manner that it may be conveniently retained, but without there being any possibility of accidental reestablishment of the circuit. In accordance with the present invention a manually adjustable element I1 is provided which serves in one position to permit the carrier II and the parts thereon to fully enter the recess 2 and which serves in another position to prevent such entry and to thereby prevent engagement of the blades l4 and II with the contacts I and 4. The adjustable element I! may be constructed and mounted in a variety of ways, but iii-Figs. 1 to 4 it is shown as being mounted on theremovable carrier and pivoted so as to be capable of movement about an axis perpendicular to the fuse axes and positioned between the said axes. As shown in these figures, the said element i'I is a flat plate, preferably formed of insulating material and pivoted on the same screw It which serves to connect the handle. it with the carrier. Preferably pins II, II are provided for limiting the t of the element ii.

The base and the carrier are provided with ribs and grooves which are adapted to fit each other; and while the form and arrangement of these ribs and grooves may be varied I have shown opposite ribs l, l formed on the base at the sides of the recess 2,.and I have shown grooves i I, i I! fcrmedin the carrier and adapted to receive the ribs i=, i With the element I! in the position shown in dotted lines in Fig. 1 and shown in full lines in Fig. 3, the carrier canbe fully enteredintherecessinthebaseso as to bring the proms l4 and i! into full eng ement withthe contacts 3 and 4. However,

when the element I1 is turned to the position shown by dotted lines in Fig. 2 and shown by full lines. in Fig. 4, the corners thereof are:- in register with the grooves il tl the result being thatthe said corners of the element l1 engage the ends of the-ribs F, I" to prevent complete entry of the carrier and the P 1 thereon into the recess 2. The carrier and the associated parts are held in the position shown in Fig. 4 with'the prongs i4 and il out of engagement with the contacts I and 4. In thiiposition the prongs l4 and i8 engage the walls of the recess 2-sufliciently to holdthe carrier and associated parts in place and to prevent it from falling out. w

The construction shown inFigs; 5 and 6 differs from that shown inl ignl to 4 in that the slots andgrooves at the sidocare. omitted. In lieu of the adjustable ii there is provided an adjustable element 2| which is similarly pivoted but different in shape. With the element 2! in the position shown in the carrier l withthe parts thereon can be fully entered lar to those shown in Figs. 5 and 6.

While the position and manner of mountingoi) the adjustable element may be varied, it is preferably a pivoted element 2| connected so as .to be capable of movement about an axis perpendicular to the fuse axes and positioned between the said. axes. As shown, the base is provided .with a centrally disposed hole, and a cotter pin 22 is provided which projects through a central,

hole in'the element 2| and through. the hole in the base and serves as a pivot for the said element 2|. that, when it is in the position shownin Fig. 8 and shown by full lines in Fig. 7, clearance is provided for the fuses F, F, and the carrier with the parts thereon can be fully entered. However, when the element 2| is turned to the position shown in Fig. 9 and shown by dotted lines in Fig. '7, the comers Lthe-said element interfere directly with the fuses F, F to prevent entry of the carrier and theirparts.

What I claim is:

1. In adevice of the class described, the combination of an insulating base having a recess open at the front, two'electrical contacts near the rear of the base and adjacent opposite ends of the recess, a removable carrier adapted to be positioned within the recess and having electrically connected contacts thereon adapted to be engaged with or disengaged from the contacts on the base, and a manually adjustable element normally within the recess and serving in one position to permitthe carrier to be moved into normal relationship to the base with the' contacts-thereon engaged with .the contacts on the base and serving in another position to prevent the carrier frommoving sufficiently to enable the contacts thereon to engage the contacts on the base.

The element 2| is cut away at the sides so 2. Inc. device of the class described, the com-,"

bination of an insulating base having a recess open at the front, two electrical contacts near the rear of the base and adjacent opposite ends' of the recess, a removable fuse carrier adapted to be positioned within the recess, fuse contacts on the carrier at the rear thereof and electrically connected with the respective fuse contacts, conducting prongs on the carrier at the rear thereof and electrically connected with the respective fuse contacts, the said prongs extending rearward and engaging the contacts on the base when the carrier is in normal relationship to the base, and a manually adjustable element normally within the recess and serving in one position to permit the carrier to moved into its normal relationship to the base and serving in another position toprevent the carrier from moving rearward suilici'ently'to enable the prongs to'engage the contacts on the base.

3. In a device of the class described, the com bination of an insulating base having a recess open at the front, two electrical contactsnear the rear of the base and adjacent opposite ends of the recess, a removable'fuse carrier adapted 75' fullyentertherecessandservinglnanotherpo:

sition of pivotal adjustment to prevent such entry and to thereby prevent engagement of the prongswith the contacts on the base.

- 4. In a device of the class described, the combination of an insulating base having a recess open at the front, two electrical contacts near the rear of the base and adjacent opposite ends of the recess, a removable fuse carrier adapted to be positioned within the recess, fuse contacts on the carrier at the rear thereof, conducting blades on the carrier at the rear thereof, and

. electrically connected with the respective fuse contacts, the said blades extending rearward and engaging the contacts on the base when the carrier is fully entered in the recess, and a manuthe contacts on the base.

5. The combination of an lnsula ng' base having a recess open at the front, two ectrical contacts near the rear of the base and adjacent opposite ends of the reces, a removable fuse,

carrier adapted to be positioned within the recess, fuse contacts on the carrier at the rear '7 thereof, conducting blades on the carrier 'at the rear thereof and electrically connected with the respective fuse contacts, the said blades extendlog rearward and engaging the contacts on the base when the carrier-is fully entered in the recess, and a manually adjustable element'mounted on the carrier and normally positioned with- V in the recess, the said element serving in one position to permit 'the carrier to fully enter the recess and serving in another position to prevent such entry and to thereby prevent engagement of the blades with the contacts on'the base.

6. The combination of an insulatlns base having a recess open at the front, two electrical contactsneartherearofthebsseand adjacent op,-

' posite ends of the recess, a removable fuse chr- 'rearwardandengssinstlnoontactsonthebase' whentheearrierisfullyenteredinthereeess,

rier adaptedto be positioned within the recess, fusecontactsonthecsrrierattherearthereof, conducting blades on the carrier at the rear thereof and electrically connected with the respective said blades extending and a manually adjustable pivoted. element mounted on the carrier and normally positioned withintherecesathesaidelementservlngin one position of pivotal adjustment to permit the car-' in: a recess open atth'efront and having a-rlb.

riertofullyentertherecessandservlnginanother position of pivotal adjustment to; prevent such entry and to therebypre'vent engagement of the bladeswith the'contacts on the base.

7. me of an insulstlngbase havwithin the recess, two electrical contacts near the rear of the base and adjacent opposite ends of the recess, a removable fuse carrier adapted to be positioned within the recess and having a groove positioned-to receive the rib on the base, fuse contacts on the carrier at the rear thereof, conducting blades on the carrier at the rear thereof and electrically connected with the respective fuse contacts, the said blades extending rearward and engagingthe contacts on the base when the carrier is fully entered in the recess, and a manually adjustable elementmounted on the carrier andserving in one position to permit the carrier to fully enter the recess and servin in another position to engage the end of the rib to prevent such entry and to thereby prevent engagement of the blades with the contacts on the base. a

8. The combination in a device of the class described, of an insulating base. having a recess open at the front, two electrical contacts near the rear of the base and adjacent opposite ends of the recess, a removable fuse carrier adapted to be positioned within the recess, fuse contacts on the carrier at the rear thereof, conducting blades on the carrier at the rear thereof and electrically connected with the respective fuse contacts, the said blades extending rearward and engaging the contacts on the base when the carrier is fully entered in the recess, and a manually adjustable element mounted on the base within the recess and serving in one position to permit the carrier to fully enter the recess and serving in another position to prevent such entry and to thereby prevent engagement of the blades with the contacts on the base.

9. The combination in a device of the class ally adjustable pivoted element mounted on the base within the recess and serving in one posi-- tion of pivotal adjustment to permit'the carrier to fully enter the recess and serving in anotherposition' of pivotal adjustment to prevent such entry and to thereby prevent engagement of the blades with the contacts on the base.

' 10. The combination in a device of the class described, of an insulating base having a recess open at the front, two electrical contacts near the rear of the base and adjacent opposite ends of the recess, a removable fuse carrier adapted to be podtioned within the recess, fuse contacts on the carrier at the rear thereof, conducting blades on the'carrler at the rear thereof and electrically connected with the respective fuse contacts, the said blades extending. rearward and engaging the contacts on the base when the carrier-is fully entered in the recess, and a manually adjustable element mounted on the base and serving in one position A to permit the carrier. to fully enter the recess and serving in-another position to engage fuses in the fuse contacts and prevent such entry and to thereby prevent engagement of theblades with the contactson the base. 

